Ocean Modelling

We use numerical models to simulate the properties and dynamics of the ocean. The effects of certain factors on the model results are compared. We also try to improve the model after comparing it with real data. Regional Ocean Modeling System (ROMS) is predominantly used in the group for our study apart from several others.

Tidal Circulation Studies Using Regional Model in the Bay of Bengal

Ocean circulation is very much important for ocean engineering in terms of building offshore structures, navigation, renewable energy and designing marine instruments. This study discusses the impact of tides on ocean circulation using high-resolution (spatial resolution 1/9° with 45 vertical levels) Regional Ocean Modelling System (ROMS) for the coastal region of the Bay of Bengal (BoB). A climatological simulation is performed with Comprehensive Ocean-Atmosphere Data Set (COADS05) air–sea fluxes and ten major tidal components from TOPEX/POSEIDON global tidal model (TPXO7). The simulation reproduced the tidal elevations well as validated with observation (at R1, near Paradeep, Odisha).

Pramanik S., Mandal S., Shee A., Halder S., Sil S. (2019) Tidal Circulation Studies Using Regional Model in the Bay of Bengal. In: Murali K., Sriram V., Samad A., Saha N. (eds) Proceedings of the Fourth International Conference in Ocean Engineering (ICOE2018). Lecture Notes in Civil Engineering, vol 22. Springer, Singapore.

Role of interannual equatorial forcing on the subsurface temperature dipole in the Bay of Bengal during IOD and ENSO events

Role of equatorial forcing on the thermocline variability in the Bay of Bengal (BoB) during positive and negative phases of the Indian Ocean Dipole (IOD) and El Niño Southern Oscillation (ENSO) was investigated using the Regional Ocean Modeling System (ROMS) simulations during 1988 to 2015. Two numerical experiments were carried out for (i) the Indian Ocean Model (IOM) with interannual open boundary conditions and (ii) the BoB Model (BoBM) with climatological boundary conditions.

Pramanik, S., Sil, S., Mandal, S. et al. Role of interannual equatorial forcing on the subsurface temperature dipole in the Bay of Bengal during IOD and ENSO events. Ocean Dynamics 69, 1253–1271 (2019).